From e56e9c1207c2e5ffd82b46bdb561e02ff94c8a2b Mon Sep 17 00:00:00 2001
From: Lars Mueller <appgurulars@gmx.de>
Date: Tue, 2 Feb 2021 15:43:55 +0100
Subject: [PATCH] Add vector.interpolate

---
 vector.lua | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/vector.lua b/vector.lua
index bef0486..59c502b 100644
--- a/vector.lua
+++ b/vector.lua
@@ -115,6 +115,12 @@ metatable.__sub = subtract
 metatable.__mul = multiply
 metatable.__div = divide
 
+--+ linear interpolation
+--: ratio number from 0 (all the first vector) to 1 (all the second vector)
+function interpolate(v, other_v, ratio)
+    return add(multiply(v, 1 - ratio), multiply(other_v,  ratio))
+end
+
 function norm(v)
     local sum = 0
     for _, c in pairs(v) do